6864549 has 16 divisors (see below), whose sum is σ = 9745920. Its totient is φ = 4282880.

The previous prime is 6864541. The next prime is 6864553. The reversal of 6864549 is 9454686.

6864549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6864549 - 2³ = 6864541 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Curzon number.

6864549 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6864549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14092 + ... + 14570.

It is an arithmetic number, because the mean of its divisors is an integer number (609120).

Almost surely, 2^6864549 is an apocalyptic number.

It is an amenable number.

6864549 is a deficient number, since it is larger than the sum of its proper divisors (2881371).

6864549 is a wasteful number, since it uses less digits than its factorization.

6864549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its digits is 207360, while the sum is 42.

The square root of 6864549 is about 2620.0284349602. The cubic root of 6864549 is about 190.0512234928.

The spelling of 6864549 in words is "six million, eight hundred sixty-four thousand, five hundred forty-nine".